the code-part of this pr is pretty simple, most work was already done in core at deltachat/deltachat-core-rust#2512
* add DC_QR_{WITHDRAW|REVIVE}_VERIFY{CONTACT|GROUP} constants
* ask to withdraw/revive qr codes
* reword redraw hints, fix typos
* reword revive statement
* Update res/values/strings.xml: Add "by others"
* Apply suggestions from comradekingu's code review
Co-authored-by: Allan Nordhøy <epost@anotheragency.no>
Co-authored-by: Hocuri <hocuri@gmx.de>
Co-authored-by: Allan Nordhøy <epost@anotheragency.no>
bjoern
466697c976